Chemical solution deposition preparation of double-perovskite La2NiMnO6 film on LaAlO3 (0 0 1) substrate

The ordered double-perovskite La2NiMnO6 films were successfully deposited on LaAlO3 substrate by chemical solution deposition method. Some La2NiMnO6 films layer with seed layer were also prepared in order to obtain higher quality films. The X-ray diffraction and Raman scattering spectroscopy are used to characterize all the films, it is found that all films are single phase with highly (0 0 l)-oriented. The field-emission scanning electron microscopy shows that the film with seed layer is relatively smooth and dense. The magnetic measurements indicate that all films exhibit a Curie temperature of about 280 K, which is close to that of the bulk material. Moreover, the low temperature magnetization of the films with and without seed layer is different, which can be attributed to that the seed layer can prevent the diffusion between the films and the substrate.